CODEWITHSUNDEEP
pythonpython-3.xpython-2.7
Mustafa
Mustafa

Reputation: 528

Why does this function not work in python 2.7 but work fine in python 3.6?

I am not sure why the function keeps returning 4 for all values of n when run with python 2.7, it works fine in 3.6. For example: aproxpi(1) should be 2.6666, and aproxpi(2) should be 3.466666.

x = 1
y = 0
pi = 0
def aproxpi(n):
    global x, y, pi
    if n <= 0:
        if y % 2 == 0:
            pi += (float(1 / x))
        else:
            pi -= (float(1 / x))
        x = 1
        y = 0
        pi2 = pi
        pi = 0
        return 4 * pi2
    n -= 1
    if y % 2 == 0:
        y += 1
        pi += (float(1 / x))
        x += 2
    else:
        y += 1
        pi -= (float(1 / x))
        x += 2
    return aproxpi(n)

Upvotes: 0

Views: 534

Answers (1)

wizzwizz4
wizzwizz4

Reputation: 6426

You are running this program in Python 2, where division is integer division by default.

Add this line to the beginning of the program:

from __future__ import division

This will make division be closer to what you'd expect.

Upvotes: 6

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